Answer:
t=L/
Explanation:
<u>solution:</u>
Let E be an observer, and B a second observer traveling with velocity 
as measured by E. If E measures the velocity of an object A as 
then B will measure A velocity as
= -
Applied here,
the walkway (W) and the man (M) are moving relative to Earth (E}, the velocity of the man relative to the moving walkway is
= 
- 
,
The time required for the woman, traveling at constant speed relative to the ground, to travel distance L relative to the ground is
:
t=L/
That is not yet possible. that technology has not yet been invented.
The strict scientific definition of work is
Work = (force) x (distance) .
If you exert a force but not through any distance, then technically,
no work has been done. You may break out in sweat, and your arm
may start to tremble and ache. But according to Physics, no work
has been done until you lift that bale a little higher.
The Wheel & Axle. The wheel has always been considered a major invention in the history of mankind
The Inclined Plane
The Wedge
The Pulley
The Screw
